<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input id="number1" type="text">
<input id="number2" type="text">
<span id="result"></span>
<button id="addbtn"></button>
<script>
    var a = 10;
    console.log(Number.MAX_VALUE );
    console.log(Number.NEGATIVE_INFINITY);
    console.log(Number.constructor);
</script>
</body>
</html>